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过程工程学报 ›› 2022, Vol. 22 ›› Issue (4): 499-505.DOI: 10.12034/j.issn.1009-606X.221095CSTR: 32067.14.jproeng.221095

• 研究论文 • 上一篇    下一篇

含钛高炉渣的碳化产物对水泥砂浆强度及电阻率的影响

唐晨钧1， 宣明2， 丁祥1， 季益龙1， 吕辉鸿2， 朱建华2， 王东3， 邓先功3， 冉松林1,2*   

  1. 1. 安徽工业大学冶金工程与资源综合利用安徽省重点实验室，安徽 马鞍山 243002 2. 安徽工业大学冶金减排与资源综合利用教育部重点实验室，安徽 马鞍山 243002 3. 安徽工业大学材料科学与工程学院，安徽 马鞍山 243002
  • 收稿日期:2021-03-22 修回日期:2021-05-27 出版日期:2022-04-28 发布日期:2022-04-24
  • 通讯作者: 冉松林 ransonglin@ahut.edu.cn
  • 作者简介:唐晨钧(1997-)，男，安徽省宿州人，硕士研究生，主要研究方向：冶金固废材料化利用，E-mail: tangchenjunn@126.com；冉松林，通讯联系人，E-mail: ransonglin@ahut.edu.cn.
  • 基金资助:
    国家自然科学基金

Effects of carbonized titanium?bearing blast furnace slag on the compressive strength and electrical resistivity of cement mortar

Chenjun TANG1,  Ming XUAN2,  Xiang DING1,  Yilong JI1,  Huihong LÜ2,  Jianhua ZHU2,  #br# Dong WANG3,  Xiangong DENG3,  Songlin RAN1,2*   

  1. 1. Anhui Province Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Ma'anshan, Anhui 243002, China 2. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ministry of Education, Ma'anshan, Anhui 243002, China 3. School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan, Anhui 243002, China
  • Received:2021-03-22 Revised:2021-05-27 Online:2022-04-28 Published:2022-04-24
  • Supported by:
    National Natural Science Foundation of China

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摘要： 以攀枝花钢铁公司生产的高钛型高炉渣的碳化产物(碳化渣)取代标准砂为集料制备了水泥砂浆。采用X射线衍射仪(XRD)和扫描电子显微镜(SEM)对高钛型碳化渣进行了成分、物相和形貌表征；测试了不同碳化渣含量下水泥砂浆的抗压强度和电阻率，探讨了不同碳化渣取代量对水泥砂浆电阻率的影响机制。研究结果表明，含有碳化渣的水泥砂浆的强度满足建筑水泥砂浆的要求；在潮湿状态下，碳化渣的引入无法降低28 d龄期水泥砂浆的电阻率；在干燥状态下，当碳化渣的取代量达到60%以上时，水泥砂浆的电阻率可低于标准水泥砂浆，且最低可下降87.5%。高钛型碳化渣可作为导电集料的候选材料用于制备面向建筑加热采暖用的水泥基复合导电材料。

关键词: 含钛高炉渣, 碳化渣, 导电集料, 水泥砂浆

Abstract: As a solid waste, titanium-bearing blast furnace slag is discarded in the slag field, which brings the double pressure of waste of titanium resources and environmental pollution to the society. It is of great significance to explore new technology and realize the comprehensive utilization of large amount of titanium-bearing blast furnace slag with full component and high added value. In this work, cement mortar was prepared by replacing standard sand with carbonized high titanium-bearing blast furnace slag (carbonized slag) from Panzhihua steel group as aggregates. The chemical composition, crystallized phase and particle morphology of carbonized slag were characterized by X-ray fluorescence spectrometer (XRF), X-ray diffractometer (XRD) and scanning electron microscope (SEM). The compressive strength and electrical resistivity of cement mortar with different carbonized slag content were tested, and the influence mechanism of carbonized slag on the electrical resistivity was discussed. The results indicated that the compressive strength of cement mortar containing carbonized slag met the requirements of building cement mortar. When the substitution of carbonized slag was 80%, the compressive strength of the obtained cement mortar was 74.7 MPa, which was 26% higher than that of standard cement mortar. With increasing substitution amount of carbonized slag, the electrical resistivity of cement mortar at the age of 3 d and 7 d decreased slowly, while that of cement mortar at the age of 28 d increased first and then decreased. When the cement mortar (28 d age) was wet, the introduction of carbonized slag did not reduce its resistivity. However, when it was dried and the substitution of carbonized slag exceeded 60%, the resistivity was dramatically decreased and lower than that of standard cement mortar. When the stand sand was completely replaced by the carbonized slag, the electrical resistivity of the dried cement mortar was the lowest with a value of 1.7×104 Ω?m, which was 87.5% lower than that of standard cement mortar. Carbonized slag with high titanium content can be used as a candidate material for conductive aggregate to prepare conductive cement-based composites for building heating.

Key words: Titanium-bearing blast furnace slag, carbonized slag, conductive aggregate, cement mortar